| ECTACO HONG KONG LIMITED | Private company limited by shares | Live |
| EC-TACTICS LIMITED | Private company limited by shares | Dissolved |
| HK ECTax Limited | Private company limited by shares | Live |
| ECTCM LIMITED | Private company limited by shares | Live |
| ECTD Group Limited | Private company limited by shares | Dissolved |
| ecTDEC Limited | Private company limited by shares | Live |
| ECTEAM LIMITED | Private company limited by shares | Live |
| ECTEC PRODUCTS COMPANY LIMITED | Private company limited by shares | Dissolved |
| ECTEC SOLUTIONS LIMITED | Private company limited by shares | Live |
| ECTECH LIMITED | Private company limited by shares | Dissolved |
| ECTECH TECHNOLOGY COMPANY LIMITED | Private company limited by shares | Live |
| ECTEST COMPANY LIMITED | Private company limited by shares | Live |
| EC-Time Co., Limited | Private company limited by shares | Live |
| EC-TIMES TECH CO., LIMITED | Private company limited by shares | Live |
| ECTK-Service Limited | Private company limited by shares | Live |
| ECTL LIMITED | Private company limited by shares | Live |
| E-C-TONG (HK) CORPORATION LIMITED | Private company limited by shares | Live |
| ECTOP TECHNOLOGY CO., LIMITED | Private company limited by shares | Live |
| ECTOP INTERNATIONAL TRADING CO., LIMITED | Private company limited by shares | Dissolved |
| ECTOPICAL ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| ECTOSHOP LIMITED | Private company limited by shares | Dissolved |
| ECTRA EURO-CHINA TRADE LIMITED | Private company limited by shares | Dissolved |
| ECTRA Industrial Technology Limited | Private company limited by shares | Live |
| ECTRA EURO-CHINA TRADING LIMITED | Private company limited by shares | Dissolved |
| ECTRA EURO-CHINA TRADING LIMITED | Private company limited by shares | Dissolved |
| ECTRA EURO-CHINA TRADING LIMITED | Private company limited by shares | Live |
| ECT-RAD COMPANY LIMITED | Private company limited by shares | Live |
| ECTRADE LIMITED | Private company limited by shares | Dissolved |
| ECTRADE LIMITED | Private company limited by shares | Live |
| ECTRADE (HK) COMPANY LIMITED | Private company limited by shares | Dissolved |
| EC-TRADE INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| ECTRADER LIMITED | Private company limited by shares | Live |
| EC-TRAIN LIMITED | Private company limited by shares | Dissolved |
| Gude Ectronics Co., Limited | Private company limited by shares | Live |
| ECtronics Technology Limited | Private company limited by shares | Live |
| ECTRONICS HK TECHNOLOGY LIMITED | Private company limited by shares | Live |
| Ectwins Trading Company Limited | Private company limited by shares | Dissolved |
| ECUMENICAL COALITION ON THIRD WORLD TOURISM (ECTWT) LIMITED | Company limited by guarantee | Dissolved |